We are pleased to announce the release of version 1.01 of the hourly drifter product. Now available to download from the Global drifter program DAC website. The methods of interpolation implemented to generate this product are the same as for version 1.00 of the dataset released in mid-2016, see Elipot et al. 2016, doi:10.1002/2016JC011716. See the release notes.

This 1.01 update adds newer data to the previous version, one year of quality-controlled data up to 30 June 2016 for Argos-tracked drifters, and more than one year of GPS-tracked data, up to 1 October 2016. In addition, we have added data before 1 September 2005 (the start date of version 1.00) by considering all GPS-tracked drifters since the beginning of the GDP, and all Argos-tracked drifter data since the beginning of the GDP, when the average of the uneven sampling intervals per trajectory is less than or equal to 3 hours.

The 1.01 dataset now totals over 117.4 million estimates of position and velocity with confidence intervals from 12,287 Argos-tracked drifter trajectories, and over 5.6 million estimates of position and velocity with confidence intervals from 985 GPS-tracked drifter trajectories.

Simplified versions of the Matlab codes used to generate this dataset are available through a GitHub repository.

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